GB718747A - A device for examining the eye - Google Patents

A device for examining the eye

Info

Publication number
GB718747A
GB718747A GB1850252A GB1850252A GB718747A GB 718747 A GB718747 A GB 718747A GB 1850252 A GB1850252 A GB 1850252A GB 1850252 A GB1850252 A GB 1850252A GB 718747 A GB718747 A GB 718747A
Authority
GB
United Kingdom
Prior art keywords
eye
comparison
light
pupil
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1850252A
Inventor
Duncan Wright Vere
David Verel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB1850252A priority Critical patent/GB718747A/en
Publication of GB718747A publication Critical patent/GB718747A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/11—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring interpupillary distance or diameter of pupils
    • A61B3/112—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring interpupillary distance or diameter of pupils for measuring diameter of pupils
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/14532—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring glucose, e.g. by tissue impedance measurement

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Biophysics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Ophthalmology & Optometry (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Emergency Medicine (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

718,747. Eye-examining apparatus. NATIONAL RESEARCH DEVELOPMENT CORPORATION. July 13, 1953 [July 22, 1952], No. 18502/52. Class 97(1) Apparatus for estimating the brightness of red light reflected by the eye comprises means for directing a beam, including red light, from a given light-shape into the eye and for producing a redcomparison field, illuminated by the same source and observed in proximity to the beam reflected by the eye the brightness of the comparison field being adjustable to a brightness equal to that of the reflected beam. By combining this device with means for simultaneously measuring the diameter of the pupil of the eye, the apparatus may be used to estimate the amount of sugar in the blood by observation of the eye alone. As shown the device .comprises a casing 11 having a light-excluding cup 14 fitting over the eye 13 of the patient and attachable to the lamp-carryings handle 16 of an ophthalmoscope. Light from the lamp 15 passes a red filter 18 and is directed to the eye 13 by a lens 19 and mirror 20 part of the beam falling on a semicircular comparison plate 21 having a white or red front surface and rotatable about an axis 22 perpendicular to the axis of the casing 11. In comparison surface 21 is viewed by an observer 26 through an aperture 23 in the mirror 20 simultaneously with the eye 13, and the illumination of the comparison surface 21 is adjusted roughly by grey wedges 28 and finally by rotation of the surface 21 about the axis 22 to adjust the intensities. A'straight edge 29 is attached to the surface 21 and by rotating the latter the diameter of the pupil of the eye 13 may be measured between the edge 29 and a member 30. Alternatively the edge 29 may be replaced by a series of projections spaced apart a known distance to effect measurement of the pupil diameter.
GB1850252A 1952-07-22 1952-07-22 A device for examining the eye Expired GB718747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1850252A GB718747A (en) 1952-07-22 1952-07-22 A device for examining the eye

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1850252A GB718747A (en) 1952-07-22 1952-07-22 A device for examining the eye

Publications (1)

Publication Number Publication Date
GB718747A true GB718747A (en) 1954-11-17

Family

ID=10113530

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1850252A Expired GB718747A (en) 1952-07-22 1952-07-22 A device for examining the eye

Country Status (1)

Country Link
GB (1) GB718747A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293169A1 (en) * 1987-05-26 1988-11-30 Alcoholism And Drug Addiction Research Foundation Method and means for detecting alcohol levels in humans
CN108836258A (en) * 2018-04-13 2018-11-20 海南医学院第二附属医院 A kind of pupil pen of convenient measurement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293169A1 (en) * 1987-05-26 1988-11-30 Alcoholism And Drug Addiction Research Foundation Method and means for detecting alcohol levels in humans
CN108836258A (en) * 2018-04-13 2018-11-20 海南医学院第二附属医院 A kind of pupil pen of convenient measurement
CN108836258B (en) * 2018-04-13 2019-05-17 海南医学院第二附属医院 A kind of pupil pen of convenient measurement

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